//##################################################################################################
//
//   Custom Visualization Core library
//   Copyright (C) 2011-2012 Ceetron AS
//    
//   This library is free software: you can redistribute it and/or modify 
//   it under the terms of the GNU General Public License as published by 
//   the Free Software Foundation, either version 3 of the License, or 
//   (at your option) any later version. 
//    
//   This library is distributed in the hope that it will be useful, but WITHOUT ANY 
//   WARRANTY; without even the implied warranty of MERCHANTABILITY or 
//   FITNESS FOR A PARTICULAR PURPOSE.   
//    
//   See the GNU General Public License at <<http://www.gnu.org/licenses/gpl.html>> 
//   for more details. 
//
//##################################################################################################

#pragma once

#include "cvfObject.h"
#include "cvfVector3.h"

namespace cvf {

class BoundingBox;
class Ray;
class OpenGLResourceManager;
class ShaderProgram;
class MatrixState;
class HitDetail;
class OpenGLContext;



//==================================================================================================
//
// Drawable is the base class for drawable items in a part.
//
//==================================================================================================
class Drawable : public Object
{
public:
    Drawable();

    virtual void        render(OpenGLContext* oglContext, ShaderProgram* shaderProgram, const MatrixState& matrixState) = 0;
    virtual void        renderFixedFunction(OpenGLContext* oglContext, const MatrixState& matrixState) = 0;
    virtual void        renderImmediateMode(OpenGLContext* oglContext, const MatrixState& matrixState) = 0;
    
    virtual void        createUploadBufferObjectsGPU(OpenGLContext* oglContext) = 0;
    virtual void        releaseBufferObjectsGPU() = 0;

    virtual size_t      vertexCount() const = 0;
    virtual size_t      triangleCount() const = 0;
    virtual size_t      faceCount() const = 0;

    virtual BoundingBox boundingBox() const = 0;

    virtual bool        rayIntersectCreateDetail(const Ray& ray, Vec3d* intersectionPoint, ref<HitDetail>* hitDetail) const = 0;
};

}